Siemens MP1515 15/15A Tandem Miniature Circuit Breaker

Siemens acquired the Murray brand and phased out the MP series. The direct modern replacement for the MP1515 is the Siemens Q1515 tandem breaker, which is UL listed for use in the same panels.

Yes. Siemens manufactures this breaker, and it is UL listed for use in both Murray and Siemens load centers that are designed to accept tandem breakers. Check your panel label for Type MH-T or QT compatibility.

This is a tandem breaker, also known as a duplex or twin breaker. It provides two independent 15-amp, 120-volt circuits while occupying a single one-inch space on the panel busbar.

No. Because both 15-amp circuits on this tandem breaker draw from the same phase, they cannot be used for a multi-wire branch circuit (MWBC). Sharing a neutral across these two circuits will overload the neutral wire. Each circuit must have its own dedicated neutral.

Not always. Many load centers restrict tandem breakers to specific slots to prevent exceeding the maximum circuit capacity of the panel. Check your panel wiring diagram to identify which busbar stabs are notched to accept circuit total limiting (CTL) tandem breakers.

The load lugs on this breaker accept 14 AWG to 6 AWG copper or aluminum wire. A 15-amp circuit typically requires 14 AWG wire for standard lighting and receptacle loads.

Yes. This 15-amp breaker is SWD (Switching Duty) rated for switching 120-volt fluorescent lighting loads. It is also HACR rated for use with heating, air conditioning, and refrigeration equipment.